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sh: Use ioremap_fixmed to map the SM501 DRAM config register

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We need to write to the DRAM config register very early and at such an
early stage ioremap() is not available. So use ioremap_fixed() to map
the register.

The reason that we are avoiding using the legacy P2 mapping is that
there will come a day when the legacy P2 mappings no longer exist.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
This commit is contained in:
Matt Fleming 2009-11-05 08:01:10 +00:00
parent 4d35b93a66
commit 6f82b6ebb1
1 changed files with 9 additions and 2 deletions
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11
arch/sh/boards/board-sh7785lcr.c
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@ -332,8 +332,15 @@ static void __init sh7785lcr_setup(char **cmdline_p)
pm_power_off = sh7785lcr_power_off;
/* sm501 DRAM configuration */
sm501_reg = (void __iomem *)0xb3e00000 + SM501_DRAM_CONTROL;
writel(0x000307c2, sm501_reg);
sm501_reg = ioremap_fixed(SM107_REG_ADDR, SM501_DRAM_CONTROL,
PAGE_KERNEL);
if (!sm501_reg) {
printk(KERN_ERR "%s: ioremap error.\n", __func__);
return;
}
writel(0x000307c2, sm501_reg + SM501_DRAM_CONTROL);
iounmap_fixed(sm501_reg);
}
/* Return the board specific boot mode pin configuration */